• 제목/요약/키워드: Poly vinyl alcohol fiber

검색결과 111건 처리시간 0.032초

다양한 분자변수를 갖는 교대배열 폴리비닐알코올의 표면 특성 (Surface Properties of Syndiotactic Poly(vinyl alcohol) with Different Molecular Parameters)

  • 권창환;김준호;류원석
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2001년도 가을 학술발표회 논문집
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    • pp.207-210
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    • 2001
  • 폴리비닐알코올(poly(vinyl alcohol) : PVA)은 우수한 기계적 성능과 계면특성 및 내약품성 등을 가진 고분자로서 호제, 의류나 산업용 섬유, 편광 및 포장용 필름, 분리용 필터 및 의학용 고분자에 이르기까지 광범위한 활용 범위를 갖는다 비닐알코올(vinyl alcohol)의 호변이성질화[1] 때문에 단량체의 직접중합에 의해서는 얻을 수 없는 PVA는 분자량, 비누화도 및 입체규칙성 정도에 따라 물성이 크게 변화하므로, 이에 따른 표면특성의 변화 정도를 종합적으로 검토할 필요성이 제기되고 있다. (중략)

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고강도 및 고탄성률 폴리비닐알코올 섬유의 제조에 관한 연구 (II) -존연신된 고분자량 폴리비닐알코올 섬유의 구조 및 물성- (Studies on the Preparation of High Strength and High Modulus Poly(vinyl alcohol) Fiber (II) -Structure and Properties of Zone Drawn High Molecular Weight Poly(vinyl alcohol) Fiber-)

  • Lee, Sung-Jun;Kim, Joon-Ho;Yoon, Won-Sik;Jeon, Han-Yong;Lyoo, Won-Seok
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2003년도 가을 학술발표회 논문집
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    • pp.76-79
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    • 2003
  • Recently, many attempts have been made to develop high strength and high modulus fibers from conventional polymers such as poly(vinyl alcohol) (PVA)[1-4] and polyethylene (PE). PVA has potentiality to yield high strength and high modulus fiber, since they have high theoretically attainable moduli because of their planar zig-zag structure. As PVA has a melting temperature as high as 230$^{\circ}C$ in contrast to PE with a low melting temperature such as 130$^{\circ}C$, it seems possible that high strength and high modulus fibers comparable to Aramid can be fabricated from PVA. (omitted)

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Preparation of Poly(vinyl acetate)/Clay and Poly(vinyl acetate)/ Poly(vinyl alcohol)/Clay Microspheres

  • Jung Hye-Min;Lee Eun-Mi;Ji Byung-Chul;Sohn Sung-Ok;Ghim Han-Do;Cho Hyun-Ju;Han Young-A;Choi Jin-Hyun;Yun Jae-Deuk;Yeum Jeong-Hyun
    • Fibers and Polymers
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    • 제7권3호
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    • pp.229-234
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    • 2006
  • Poly(vinyl acetate) (PVAc)/poly(vinyl alcohol) (PVA)/montmorillonite (MMT) clay nanocomposite microspheres with a core/shell structure have been developed via a suspension polymerization approach. In order to prepare the PVAc/ MMT and PVAc/PVA/MMT nanocomposite microspheres, which are promising precursor of PVA/MMT nanocomposite microspheres, suspension polymerization of vinyl acetate with organophilic MMT and heterogeneous saponification were conducted. A quaternary ammonium salt, cetyltrimethylammonium bromide, was mixed with the MMT in the monomer phase prior to the suspension polymerization. The rate of conversion decreased with an increase in MMT concentration. The incorporation of MMT into the PVAc was verified by FT-IR spectroscopy. Organic vinyl acetate monomers were intercalated into the interlayer regions of organophilic clay hosts and followed by suspension polymerization. Partially saponified PVA/MMT nanocomposite microspheres with a core/shell structure were successfully prepared by heterogeneous saponification.

고분자량 혼성배열 폴리비닐알코올/염료 복합체 필름의 제조 (Preparation of High Molecular Weight Atactic Poly(vinyl alcohol)/Dye Complex Film)

  • Park, Joo-Min;Kim, Sam-Soo;Lyoo, Won-Seok
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2003년도 봄 학술발표회 논문집
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    • pp.48-51
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    • 2003
  • Poly(vinyl alcohol) (PVA) obtained by the saponification of poly(vinyl ester) like poly(vinyl acetate) or poly(vinyl pivalate) is a linen. semicrystalline polymer, which have been widely used as fibers for clothes and industries, films, membranes, medicines for drug delivery system, and cancer cell-killing embolic materials[1-3]. PVA fibers and films have high tensile and compressive strengths, high tensile modulus, and good abrasion resistance due to its highest crystalline lattice modulus. (omitted)

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PVA/아조염료계 편광필름의 편광효율에 따른 혼성배열 폴리비닐알코올의 분자량 효과 (Effect of Molecular weight of Atactic Poly(vinyl alcohol) (PVA) on the Polarizing Efficiency of PVA/Azo Dye Polarizer)

  • Park, Joo-Min;Kim, Sam-Soo;Lyoo, Won-Seok
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2003년도 가을 학술발표회 논문집
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    • pp.104-107
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    • 2003
  • Poly(vinyl alcohol) (PVA) obtained by the saponification of poly(vinyl ester) like poly(vinyl acetate) o. poly(vinyl pivalate) is a linear semicrystalline polymer, which has been widely used as fibers for clothes and industries, films, membranes, medicines for drug delivery system, and cancer cell-killing embolic materials[1-3]. PVA fibers and films have high tensile and compressive strengths, high tensile modulus, and good abrasion resistance due to its highest crystalline lattice modulus. (omitted)

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피발산비닐의 저온 현탁중합에 의한 고교대배열 초고분자량 폴리비닐알코올의 고효율 제조 (Preparation of Syndiotacticity-Rich Ultrahigh Molecular Weight Poly(vinyl alcohol) with High Yield Using Low Temperature Suspension Polymerization of Vinyl Pivalate)

  • 류원석;박찬식
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2002년도 봄 학술발표회 논문집
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    • pp.33-36
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    • 2002
  • 폴리비닐알코올 (poly(vinyl alcohol), PVA)은 의류 및 산업용 섬유, 막, 약물전달, 암세포 괴사용 색전제등에 널리 사용되고 있다[1,2]. 이런 PVA와 같은 비닐계 고분자는 분자량 이외에도 입체규칙성에 따라 그 물리적 성질이 변화하는데 그 입체규칙성에 따라 혼성배열, 동일배열 및 교대배열 고분자로 분류할 수 있다. PVA는 일반적으로 55% 이상의 교대배열 다이애드기 함량을 가질 때 교대배열 PVA라고 불린다. (중략)

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Poly(vinyl alcohol)/ Sodium Alginate 블렌드의 제조 및 특성 (Preparation and Characterization of Poly(vinyl alcohol)/ Sodium Alginate Blend)

  • Koo, Won-Mi;Jung, Du-Kam;Lee, Young-Hee;Kim, Han-Do
    • 한국섬유공학회:학술대회논문집
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    • 한국섬유공학회 2001년도 가을 학술발표회 논문집
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    • pp.25-28
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    • 2001
  • Polymer blending constitutes a most useful method for the improvement or modification of the physicochemical properties of polymeric materials. Some of the polymer blends exhibit unusual properties, unexpected from homopolymers. An important property of a polymer blend is the miscibility of its component, because it affects the mechanical properties, the morphology, its permeability and degradation [1, 2]. (omitted)

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